TheFrenchPlumbot I loaded your page and see the same avatar you do, which is to say, your new one has not uploaded. It's possible there's a delay, but it's also possible the function is broken. If I see more reports, I'll merge them, and I'll ask around regardless.
In the interim, your studio only shows an object and some plumbots. Did you in fact upload a sim, that the Exchange lists as a sim, and try to set that as the avatar? If not, or if you did so but immediately tried a plumbot afterwards, please try a sim again, just to see whether it works if you give it some time.
If you can find any upload that the site accepts as an avatar, there's a trick to get the image you want: you replace the headshot in the Sims3Pack with the image you'd like to use. If you're interested (and can get the avatar to change at all) but don't know how to do this, just ask.
how do i replace the headshot?
